Number | Name | Date | Kind |
---|---|---|---|
D139444 | Lippincott | Nov 1944 | |
D268876 | Leithauser, Jr. | May 1983 | |
D269639 | Eargle, Jr. | Jul 1983 | |
D332503 | Ewing et al. | Jan 1993 | |
D333011 | Ewing et al. | Feb 1993 |
Entry |
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Harrington & King Peforating Co. catalog, May 1961, p. 109, diagonal slots. |
Harrington & King Perforating Co. catalog, May 1961, p. 118, triangular hole. |
Harrington & King Perforating Co. catalog, May 1961, p. 121. round hole pattern. |